Preheat your oven to 350°F (177°C).

Cream together the unsalted butter, brown sugar, and granulated sugar in a large bowl until smooth and fluffy, about 2-3 minutes.

Beat in the smooth peanut butter until fully combined.

Add the large egg and vanilla extract, mixing well until everything is beautifully blended.

Whisk the all-purpose flour, baking powder, baking soda, and salt in a separate bowl.

Gradually mix the dry ingredients into the wet mixture until just combined.

Stir in the old-fashioned oats and chocolate chips gently.

Drop rounded tablespoons of cookie dough onto a baking sheet lined with parchment paper.

Bake in the preheated oven for 10-12 minutes or until the edges are lightly golden.

Cool on the baking sheet for a few minutes before transferring to a wire rack to cool completely.